I just got a Winegard HD7084P installed for free from VOOM. I placed the antenna in the attic pointing at 38 degrees to location of all the broadcasts in my area. Before I was getting FOX, ABC, PBS with the Stealth Antenna. Now I get CBS week, FOX, ABC and that's it. No NBC or UPN9, PBS or 11. I would think with this huge antenna I should receive everything now. I am only about 25-30 miles aways. The signal strength on the OTA antenna is at 0 for the channels that I am not receiving. Anyone have any suggestions or ideas?